十天干 [ㄕˊ ㄊㄧㄢ ㄍㄢ; shi2 tian1 gan1] the 10 heavenly stems 甲, 乙, 丙, 丁, 戊, 己, 庚, 辛, 壬, 癸 (used cyclically in the calendar and as ordinal number like Roman I, II, III) ◄ ►